Pump



June 26, 1928.

W. T. SMITH PUMP 2 Sheets-Sheetl 1 Filed April 2, 1927 June26,192s. Y1,675,200 n W. T. SMITH PUMP Filed April 2, 1927 2 sheets-sheet 2latented .lune 26, 1928.

narran STATES WALTER T. SMITH, OF (AIJVIESTOIT,v TEXAS.

. PUMP.

.applicationl ined April 2, 1927. vseriai No. 180,524.

lThis invention relates to pumps, more par. ticiilarly to pump casingsusedy in connec` tion more particularly with hydraulic (hedgingoperatings. Heretofore it has been usual to pump up the water carryingsolid matter in suspension into the bins of sea-going barges or dredgesand allowing the solid matter to settle out. rlhis procedure involvesconsiderable delay.

The broad purposeof my invention is to provide a casing in combinationVkwith a pump runner ork impcller for the purpose of separating, duringthe pumping operation, the liquidsan'd the solid matter carried insuspension thereby, and more or less concentrating the latter into asolid or semisolid or soupy state and to discharge such concentratevindependently through one outlet -and to discharge the water or otherYfluid fg through another independent outlet, the concentrate beingreceived in a Suitable bin oi' other storage means. 1

.Further objects are to provide anovel casing having two concentricnearly annular chambers separated by a straining means and havingsuitable discharges and being concentric with an impeller; to provide insuch a casing areadily removable and renewable straineielement,toprovidea sim` ple casing composedV of a plurality of parts capable of-qnickassemblage ,and separation; to provide a novelannnlar band constructionconstituting theouter annular chamberV and discharge; to combine thestrainer lelement and said outer annular band member in such 'manner asto facilitate the insertionV and removal of such strainer element and toconfine it against outward distortion; and to provide a suitable runnerhaving specially designed Vanes in combination with the casing formed toprovide two periplierally extending concentric chambers divided by astrainer element whereby thel liquid being acted upon willbe forcedoutward, the clarified liquid passing through the strainer element intothe outer .chamber and the more solid material being retained in thekinnergchamber and the contents of both of such chambers being acted uponby the pressure-created by the rotation of said runner-.to force saidcontents of both of said. chambers out of the respective dischargesthereof, all of whichobjects among others are accomplished by theconstruction, com-k bination and arrangement of parts herein- '-lAnyusual packingF may after more scribed.

' In the accompanying drawings,'in which only.l several of the possibleembodiments of my invention are shown and described for the purpose ofillustrating my invention and the practice thereof as by law required,but with no intention of being limited thereto, it being recognized byme that it is `capable of embodiment in a number of other forms. `.Fig.l represents a sectional view of a device embodying my invention takenon line' 1-I-l `of Fig. 2; i

Fig. Qrepresents a sectionalview thereof taken at right angles to Fig.`l, on line 2-2 of said figure; n

.Figa 3 represents a fragmentary sectional view, similar to Fig. l', ofa modified casingv construction; and

Figure el, a view similar to Fig. l, of a further modification. i

Referring nowin detail to thev drawings, A designates the rotarylimpeller shaft passing through bushing E of end plate B of particularlysetforth and de the casing, said runner being,` of course, disposed inthe interior of the casing, which casing comprises said end plate B, anopposite end plate Bf', and an annular band element ltffitting againstthe annular shoulders Il govffsaid end plates with its radially innerside edges and Vbeing held assembledwith said end plates byfany suitablemeans such as, for instance, screws C extending through said end platesinto said annulark memberief f End plate B is provided withan inwardlyflaring intake oi',`iiilet D which has.V an axially outward extendinginternally screw threaded hub orbushing H into whichA the externallyscrew threaded end of the suction pipe, not Shown, may be screwed, asvusual.

N be arranged about the shaft A inthe bushing E ofy plate B and will bepacked `by the gland-nut G as usual. l f Y H Eachwof said plates B and Bmaybe proy vided with reinforcing radially extending webs such as'J andthe said end plates vand annular ineinber 14 will bevof such `materialand of Vsuchthiclinessasmay be required by the material being vactedupon and the operating `pressures in Vthe-interior of the casing, whichVpressures in dredging operations usually-.vary from 4 0 to 125 poundsiin i 8V and shoulders 13.

7 `will have perforations of such size as best to the sq. in. Theannular band 14 is to be concaved in `its interior face to provide anouter chamber 1 which extends about the casing from a point adjacent tothedischarge outlet 5 of chamber-4 to a point underneath and closelyadjacent to said outlet 5 and there is in communication with its and foneach side of, outlet 5 and will havesome provision for radiallyconfining the strainer element v7, for instance, integral cross bars 8arranged at equidistant points between said shoulders 13 and `arrangedin a radial direction closely adjacent to the radially inneruedges ofsaid member 14 and said bars 8 may extend entirely across the i outerchamber 1 or may be of any suitable construction suitable to theirfunction.

The strainer element `7, of relatively heavy perforated sheet metal, isforced into place against said bars 8 and is spread'in a peripheraldirection until its ends 7 are in tight `contact with the respectiveshoulders 13 When the strainer element 7 as a Whole is under compressionholding the said straining element tightly against said VAbars Saidstrainer element suited to ythematerials being acted upon and mayhaveimperforate parts which in assembled relation `will register with a therespective bars 8 las illustrated thereby pre-l serving the strength ofthe `strainer element as a Whole i v `'LIhe shaft A may have a reducedexter-i nelly screw-threaded end 9 receiving the internallyscrew-threaded hub `10 of the impeller or runner as usual.

Said runner comprises two end plates 11 and 11l having between themcurvilinearly disposed valles 127 thezplate 11 having a central intakeopening registering with the opening I) in plate B to permit the intakeof the materials to be acted upon and the said end plates `11 and 11 andvanes 12 all extend preferably to the same distance radially and will bespaced, as illustrated, at an appreciable distance radially from thestraining element "7, such annulartinterva] constitutingan innerconcentric concentrate chamber 4, above mentioned,`communicating withdischarge 5 asstateol." Y

i The interval between the'pat-h of travel ofthe radial outer ends ofthe vanes 12 and the straining element 7 Will varylin accordance withthe nat-ure of the material being actedupon and to` this endtheparticular The operation may bebrie y stated vas follows Theimpellerrrotates in the direction of the arrow, Figure 2, and draws theWater and matter in suspension through the opening Dand then forces theWater through the strainer element? into `the outer chamber 1 and thesolid or semi-solid material radiallyoutward into the chamber 4avhereinit is retained by the strainer element 7 in a solidforl semilsolid orsou y Vstate and the materialin bothsaid cham 1ers, beingunder pressuregenerated by the rotation of lsaid runner and the curvilinear form ofthe blades thereof is forced outward by said pressure through theindependent discharge outlets 2 and 5` respectively of said chambersthrough their respective discharge pipes, not shown,V to theirrespective separate points of discharge. Y j i .ln themodified formshown in Figure 3 the operation is in all respects the same asin theprefc'rredform alcove described, and the construction isthe same as insaid preferred form except in the following respects: Insteadoftheannularmeinber 14, an annulaimember 18 is` vsubstitutedsaid'annu'lar niembe`r`18 having a radially inner `peripheral band "19jttingagairist annular .shoulders lpf rims 21 supported in lposition byinue radialiY extending bars or struts 22 and similar ra ijallyouterstruts formed n-` tegrally with sidefplates Iand I" and ex' tending-in"the interior of saidv plates.'

Strainer elements23 are arranged in an annularjband in each plate L andL and bear against the `equi-distantly spaced radial struts orfbars 22of the respective Lvplates I and I, said straining elements'23, togetherwith said rims 21, constitutingttlie end Walls of the inner annularchamber 4 and said band A19;constituting the annularly 4outer Wallthereof. `Saidele'm'ent 18 is provided with an annular chamber 17between said inner band elen'ient 19 and 'said outer part 18, said partsbeing held spaced 'by radial integral portions or struts 20 permittingbetween Y them `conununication betweenV said outer chamber 17 and saidinner chamber 4 by means of annularly extending communi-` cationpassages `16"extending in an axial vdirection .in said plates I and Ifronithe straining element around the rims `24L to the respectiveadjacentends of the annular band element 18 where they communicatethrough the spaces between the radially out# er struts 20 with theintervals between the spacing struts 2O and so permit commuf' nicationbetween said chambers 4s and ,17 to allow the water .discharged throughthe straining elements 22to'pass into the outer chamber 17 and bedischarged Vthrough its discharge outlet 2.

1n Figure 4' the two previous embodiments are merged in asingle'embodiment providing the radial holes in the strainer 7 over thetop portion and for roughly two-v thirds of the periphery of the innerchamber t and the lateral holesin thestrainers 28 at thebottom, whilethe radially7 inner face ofthe imperforate element 19 presentsa smoothunbroken surface on which the solid or semi-solid matter rests and movesin the iinal stages of the discharge.

Having thus described my V invention, what l claim as new and desire tosecure by Letters Patent is:

1. A pump casing comprising an endless annular member having its innerface sharp ly concave in cross-section to forni an` annularly extending;chamber in said member, two end plates, and means for removably securingsaid plates against the respective ends of said member, in combinationwith an impeller mounted to rotate in said casingwand.

of such diameter as to leave a vdistinct annular chamber betweensaid'impeller. and the chamber in said'annular member, and an annularlyextending straining element mounted in said casing and so locatedtherein as to permit communication between said chambers thereof, saidcasing being provided with two distinct discharge ports respectivelycommunicating with, and permitting the independent discharge of the con.

tents. of, the respective annular-ly extending chambers. l

Q. A pump casing comprising an endless annular member having its innerface sharply concave in cross-section to form an annularly extendingchamber in `said mem ber, two end plates, and means for removablysecuring said plates againstthe respective ends of said member, incombina tion with an impeller Vmounted to rotate in said casing and ofsuch diameter as to leave a distinct annular chamber between saidimpeller and the chamber in said annular member, and an annularlyextending removable straining element mounted in said casing and solocated therein as to permit communication between said chambersthereof, said easing being provided with two distinct discharge portsrespectively communi-v cating with. and permitting the independentdischarge of the contents of, the respective annularly extendingchambers.

3. A pump casing comprising an endless annular member having its innerfacey ing chambers.

sharply concave in cross-section to forman chambers thereof, said casingbeing pro-V vided with two distinct discharge Aports respectivelycon'imuni'cating"with, and permit# ting ther independent discharge ofthecon* tents of, the respective annularly extending chambers.

t. A pump casing comprising anv endless annular member having its linnerface sharply concave in vcross-section to form an annularly extendingchamber in Vsaid mem ber and provided with stops extending` ax# iallyvfrom its inner face, two end plates, and

means for removablysecuring Vsaid plates against the respective ends ofsaidA member, in combination with an impeller mounted to rotate in saidcasing andL of such diameter as to vleave a distinct `annular,,chamberbetween said impeller and the chamber in said annular member, andanannularly extending straining element litted in said annular member,confined therein against radial exs pansion by said stops, constitutingthe partition between said chambers, and permitting the liquid in theinner chamber to be vforced into the outer chamber, said casing beingprovided with two distinct discharge ports respectively communicatingwith, and permitting the independent discharge of the contents of,therespective annularly extend- Y 5. A. pump casing comprising anendless annular member having its inner sharply concave in cross-seetiontoy form an -annularly extending chamber in said mem-V ber and providedwith stops extending axially from itsinner face and formed withv twoopposed peripherally. presented shoulders, two end plates, and means forremov ably securing said plates against the respective ends ofsaidmember, in combination with an impeller mounted to rotate 1n saidcasing and of such diameter as to leave a distm'ctannular chamberVbetween said 1mpellerand the" chamber` in said annular member, and anannularly extending straining element removably fitted in said annularmember, having its ends in engagement with said shoulders respectivelyand being under compression and beingheld against radial expansion bysaid stops, said straining element constituting the partition betweenfaceaok said ,Chambers and permitting the liquid in. the inner chamberto be forced off into the outer chamber, said casing being provided withtwo distinct discharge ports respectively communicating with andpermitting the independent discharge o1A the contentent, the respectiveannularly extending chambers. n f

6. A pump casing comprising an endless annular member having its inner.`face sharply concave in crossfsection to form an annularly extendingchamber in said member, said casing having a further chamber and beingformed with an intake, and said annular member being formed with adischar e outlet communicating directly with t Ve Vchamber therein andwith a furtherV and distinet outlet having imperforate walls extendingAthrough the chamber insaid member and being 1n direct communicationwith the other chamber `in said casing,

7. A pump casing consisting of an endless annular member having itsinner face sharply concave in cross-seetion to formy an annularlyextending chamber in said member, two endplates of unbroken area exceptfor the usual central bore in one to receivethe drive shaftand theintake opening in the other, and means for removably securing saidplates against the respective ends of 'said member said member beingformed with two independent dischargeoutlets, one of which commnnicatesdirectly with the chamber therein, `:and` the ethernet which is out. oitcemmunieation with said chamber and in direct communication with theinterior'of ,said easing radiallyfinward of said chamber.` v.

8. A pump casingl comprising an annnla member having its inner facecupped in cross-section to yform an annularly -extend- Ving chamber andbeing formed with two independentdischarge outlets, one being in direct`eonimnnication with said chamber means for removably securing saidplates to Y said member, each of said plates being formed with anannular slionlders'nucgly Htting within the respective annular e ges ofsaid member.

I n testimony whereof, I have signed my name' to thisispeciicationat NewOrleans, Louisiana, this 22 `day of March, '1927` L f WALTER T. SMITH.

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